Ontario Grade 9 Mathematics

A current guide to Ontario's de-streamed Grade 9 Mathematics course MTH1W, its strands, assessment context, and readiness.

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A course pathway is a sequence of choices with prerequisites, alternatives, and later destinations. Grade-level milestones run left to right with branching course options and a reminder to verify prerequisites. The branches show that changing a route is a planning question, not a value judgement about a learner.

Precise definition

Ontario Grade 9 Mathematics is the de-streamed course MTH1W under the 2021 curriculum. It serves students on varied pathways and organizes learning through mathematical processes and social-emotional learning, number, algebra, data, geometry and measurement, and financial literacy, with coding integrated in the curriculum.

Notation and mathematical language

Course work includes rational and irrational numbers, powers, algebraic manipulation and equations, coding, linear and nonlinear relations, data literacy, geometry and measurement, and financial applications. Exact content and expectation wording should be checked in the official MTH1W curriculum.

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Interpretation and application

MTH1W supports Grade 10 mathematics, trades and workplace numeracy, college and university pathways, and informed financial decisions. A model or data trend should be interpreted with its domain and uncertainty; correlation is not automatically causation.

Common mistakes

Sources and verify-current information

Course expectations and code: Mathematics, Grade 9, De-streamed (MTH1W), 2021.
Time-sensitive evaluation policy: Growing Success updates. Confirm dates and implementation with the school.